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Marijuana advocates worried that President Donald Trump’s administration will crack down on state weed laws used the unofficial holiday celebrating the drug to call for a “joint session” of Congress — pun intended.

The pro-cannabis rights group DCMJ used April 20th — or 4/20 — to organize a free joint giveaway just steps from the Capitol in an effort to encourage Congress to reauthorize an expiring provision preventing the federal government from meddling in medicinal marijuana programs.

Even as approval ratings for legalized marijuana reach new highs, the new administration is pushing for pro-pot policies to go up in smoke.

A CBS News poll released Thursday found 61 percent of Americans support legal marijuana use, up five points from one year ago. More than 70 percent of Americans said they do not think the federal government should block marijuana sales in states that have legalized the drug.

“Its use and possession is against federal law and until the law is changed by the United States Congress, we in DHS, along with the rest of the federal government, are sworn to uphold all the laws that are on the books," he said.

Many states, however, have legalized some form of marijuana use. And its acceptance has increasingly become a bipartisan issue.

Four members of the House of Representatives, two Democrats and two Republicans, announced the formation of the Congressional Cannabis Caucus in February to help integrate federal and state laws governing weed.

Oregon Democratic Rep. Earl Blumenauer, a co-founder of the caucus, said in a Reddit “Ask Me Anything” on Thursday said he has issued clear warnings to the White House not to impede on what Oregon and other states have done to legalize the drug.

“We've pointed out repeatedly in the press and with advocate groups that marijuana got more votes than Donald Trump last November and that the American people are on our side,” Blumenauer wrote.

Support has come from even the opposite side of the political spectrum, like longtime Trump ally Roger Stone. “Don't let Jeff Sessions' draconian views on 420 run roughshod over states,” he tweeted to Trump Thursday.

Though recreational marijuana use is legal in the nation’s capital, it is not legal to consume it in public or to possess more than two ounces. And under federal law it is illegal to possess pot. Capitol Police said they arrested seven volunteers with DCMJ on Thursday, four for possession and two for possession with intent to distribute.

More arrests are expected on Monday when another demonstration is planned on the Capitol.

“Possession of cannabis on the Capitol grounds is not legal. Consuming cannabis anywhere in DC outside of a home is not legal either,” organizers warned in a statement announcing the protest. “But sitting quietly while the Trump administration rolls back our freedoms is not something we plan to do. We need to be loud and proud!”

Andrew Rafferty

Andrew Rafferty has been a political reporter for NBCNews.com since 2013. Rafferty writes and reports on politics for the web, and shoots and produces video for all NBC platforms.

Prior to joining NBCNews.com, Rafferty was a campaign reporter covering the 2012 presidential election. Rafferty was on the road for both the Republican primaries and general election, providing content for both the web and television.

Rafferty began at NBC News through a fellowship at "Meet The Press."

He is from Buffalo, N.Y., and attended John Carroll University in Ohio.